


Great Lakes Forecast
Issued by NWS
Issued by NWS
436 FZUS63 KDTX 221350 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 950 AM EDT Tue Apr 22 2025 Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...High pressure, 30.10 inches, will move across the Great Lakes today. It will then hold nearly stationary over the eastern Great Lakes tonight through Wednesday night while strengthening to 30.30 inches. Low pressure is forecast to track across the Ohio Valley and eastern Great Lakes Friday into Friday night, brining a chance of rain to the region. High pressure will then expand across the region from the north this weekend. LCZ460-222200- Lake St Clair- 950 AM EDT Tue Apr 22 2025 .REST OF TODAY...Northwest winds 10 to 15 knots backing to the southeast late in the afternoon. Sunny. Waves 2 feet or less. .TONIGHT...South winds 10 to 15 knots diminishing to 5 to 10 knots late in the evening...then increasing to 10 to 15 knots after midnight. Partly cloudy this evening becoming mostly cloudy. Waves 2 feet or less. .WEDNESDAY...South winds 10 to 15 knots becoming southeast 5 to 10 knots in the late morning and afternoon. Partly sunny. Waves 2 feet or less. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Partly cloudy. Waves 2 feet or less. .THURSDAY...Southeast winds 5 to 10 knots backing to the east in the evening. Partly sunny becoming mostly sunny in the afternoon becoming partly cloudy. Waves 2 feet or less. .FRIDAY...Northeast winds 10 to 15 knots. Mostly cloudy. Light showers likely and a chance of thunderstorms. Waves 2 feet or less. .SATURDAY...North winds 15 to 20 knots. Partly cloudy. A chance of light rain and thunderstorms. Waves 1 to 3 feet. $$ SC Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes